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DHCP client on wan interface - ip cleared
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05-14-2012 05:32 AM
The wan interface on a PA-200 (PANOS 4.1.6) is set up as DHCP client, receiving ip-address from the ISP. When the lease period is out, the ip address is cleared with this message in System Log:
DHCP client cleared IP address on interface:ethernet1/1 due to: Lease expiry
The problem is that an admin has to manually request a new ip address, this is pretty annoying, especially when the ISP is using a lease time of 2 hours.
Anyone who knows a way to ensure that the ip address is not cleard, or at least automatically renewed?
Regards, Einar.
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05-15-2012 04:58 AM
You are very welcome, good luck 😆
FWIW, it's a clear bug and the PA's behaviour is clearly non-rfc compliant. Very annoying as well.
Other devices (Cisco, PC's etc) have no issues at all either over here.
In fact, I am now using a cisco router to renew my DHCP lease, and have given the PA a static IP address = same as dhcp address. As long as the Cisco and the PA have the same IP address, both have the same MAC address (!), and all traffic but DHCP is filtered on the Cisco, it works. Cannot think of a dirtier/stranger way to work around the problem but it works quite well, I too had a lease time of 2 hours and frequent disconnects (I learned the same-MAC-address trick in the days that Checkpoint didn't support DHCP :-)).
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05-15-2012 06:15 AM
Speaking of DHCP leases and bugs this seems to have been a neverending story for manufacturers of broadbandrouters such as D-Link and Netgear among others.
Looks like there are plenty of ISPs out there who does this differently in one way or another.
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05-24-2012 01:45 PM
It seems I'm experiencing the exact same problem (on version 4.1.6), my other routers (Cisco & Draytek) don't have this issue and are getting a lease from the ISP within seconds.
Very annoying, hopefully their will be a patch soon.
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07-30-2012 12:05 PM
Just a heads up that 4.1.7 has just been released, with the fix for the problem discussed here.
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08-01-2012 02:23 PM
Sorry to inform you all, but the 4.1.7 release didn' help. I still got the 'DHCP client cleared IP address on interface:ethernet1/1 due to: Lease expiry' on my PA-200...
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